[RFI] Solar Panel RFI - Noise begins

Tony dxdx at optonline.net
Sat Aug 20 17:36:37 PDT 2011

On 8/20/2011 5:22 PM, Pete Smith wrote:

>  It might be more useful if you showed us a panoramic display with a
>  wider band-spread, to see if there is a characteristic repetition every x KHz, or something similar. 73, Pete N4ZR


The noise was repetitive, but I don't recall how far apart the signals
were. It disappeared a few hours ago so I'll have to wait till it pops
up again to make another video -- I'll post it ASAP.

I wonder if it's more likely for solar panels to cause RFI during the
day when they are being charged?

Thanks Pete..


>  On 8/20/2011 4:50 PM, Tony wrote:
>>  All,
>>  As I mentioned yesterday, my neighbor installed solar panels on his roof
>>  (thanks for all the replies). The installation was completed today and
>>  it appears to be causing RFI.
>>  I doubt this is a coincidence because beam heading to my neighbor, some
>>  400 feet away, was very quite prior to the solar panel install. I made a
>>  short video (please see below) hoping that someone can confirm if this
>>  is typical of solar panel noise.
>>  RFI Video -- http://www.youtube.com/watch?v=S1s0wSTfDnM
>>  The noise appears on 20 through 10 meters, but seems to be absent on 15
>>  meters. I'm assuming that the system goes into "sleep mode" some time
>>  after sundown so I'll check again this evening.
>>  Thanks,
>>  Tony
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